JP5483848B2 - Dipping pipe for simple refining equipment - Google Patents

Dipping pipe for simple refining equipment Download PDF

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JP5483848B2
JP5483848B2 JP2008241278A JP2008241278A JP5483848B2 JP 5483848 B2 JP5483848 B2 JP 5483848B2 JP 2008241278 A JP2008241278 A JP 2008241278A JP 2008241278 A JP2008241278 A JP 2008241278A JP 5483848 B2 JP5483848 B2 JP 5483848B2
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refractory
dip tube
brick
divided
basic
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JP2010070822A (en
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公宏 安井
敏一 寺島
邦博 小出
真一 後藤
誠 松山
章弘 新保
敏明 伊東
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Nippon Steel Corp
TYK Corp
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Nippon Steel and Sumitomo Metal Corp
TYK Corp
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Description

本発明は、減圧できる容器の下部に連結された浸漬管を溶鋼に浸漬して溶鋼を吸い上げ、脱ガスを行ったり、合金投入による成分調整、酸素吹き込みによる脱炭、フラックス添加によるスラグ精錬、等を行う簡易精錬装置用浸漬管に関する。   The present invention immerses the dip tube connected to the lower part of the container that can be depressurized in the molten steel, sucks the molten steel, performs degassing, component adjustment by charging the alloy, decarburization by blowing oxygen, slag refining by adding flux, etc. The present invention relates to a dip tube for a simple refining apparatus.

簡易精錬装置は、主に溶鋼中の脱ガス、特に脱水素、脱炭を行うＲＨ（Ruhrstahl-Heraus）脱ガス装置やＤＨ（Dortmunt-Horde）脱ガス装置等である。簡易精錬装置の溶鋼への浸漬部は、浸漬管と称される。浸漬管は、鋼等の金属製円筒状芯金と、その内周、下端及び外周を被覆する耐火物層と、から構成されている。耐火物層の耐火物としては、不定形耐火物と定形耐火物とを組み合わせて使用することが一般的で、例えば、内周と外周の耐火物を煉瓦で構成し、下端部の耐火物を不定形耐火物で構成した浸漬管が知られている（例えば、特許文献１参照。）。また、内周、外周及び下端の耐火物を不定形耐火物で形成した浸漬管も知られている（例えば、特許文献２参照。）。     The simple refining apparatus is mainly an RH (Ruhrstahl-Heraus) degassing apparatus or a DH (Dortmunt-Horde) degassing apparatus that performs degassing in molten steel, particularly dehydrogenation and decarburization. The immersion part in the molten steel of a simple refining apparatus is called a dip tube. The dip tube is composed of a metal cylindrical cored bar such as steel and a refractory layer covering the inner periphery, lower end and outer periphery thereof. As the refractory for the refractory layer, it is common to use a combination of an amorphous refractory and a fixed refractory.For example, the inner and outer refractories are made of brick, and the refractory at the lower end is used. A dip tube made of an amorphous refractory is known (for example, see Patent Document 1). Moreover, the dip tube which formed the refractory of the inner periphery, the outer periphery, and the lower end with the irregular refractory is also known (for example, refer patent document 2).

上記従来の浸漬管においては、芯金の下端部にスタッドを植設してこれに不定形耐火物を固着させて耐火物を支持している。
特開平１１−２１６１５号公報 特開平１０−１１０２１３号公報 In the above-mentioned conventional dip tube, a stud is planted at the lower end portion of the core metal, and an amorphous refractory is fixed to the stud to support the refractory.
JP-A-11-21615 JP-A-10-110213

上記従来の浸漬管は、溶鋼と接する内周、外周及び下端が不定形耐火物で被覆されているか、内周、外周の中間位置以上の部位が定形耐火物で被覆されているものの、下部は全体が不定形耐火物で被覆されているため、耐火物の摩耗損傷が大きかった。また、従来の浸漬管は、芯金の下端部にスタッドを植設してこれに不定形耐火物を固着させて耐火物を支持しているため、耐火物の脱落を防止することが不十分であった。   The above-mentioned conventional dip tube is coated with irregular refractories on the inner circumference, outer circumference and lower end in contact with the molten steel, or the portion of the inner circumference and outer circumference is covered with the fixed refractory, but the lower part is Since the whole was covered with an irregular refractory, the wear damage of the refractory was large. In addition, since the conventional dip tube supports the refractory by planting a stud at the lower end of the core bar and fixing the amorphous refractory to the stud, it is insufficient to prevent the refractory from falling off. Met.

浸漬管における浸食性と摩耗性とは、浸漬管の内周側と外周側とでは大きく異なる。すなわち、外周側の耐火物は、取鍋の溶鋼表面に浮遊するスラグ層との化学反応によって大きく浸食される。内周側の耐火物は、溶鋼の環流に伴う乱流によるアタックで大きく摩耗される。一般的に、不定形耐火物は定形耐火物に比べ耐食性が劣り、損傷が大きいため、従来の浸漬管は、摩耗損傷が大きかった。   The erodibility and wear of the dip tube are greatly different on the inner peripheral side and the outer peripheral side of the dip tube. That is, the refractory on the outer peripheral side is greatly eroded by a chemical reaction with the slag layer floating on the molten steel surface of the ladle. The refractory on the inner peripheral side is greatly worn by an attack caused by turbulent flow accompanying the circulating flow of molten steel. In general, amorphous refractories have poor corrosion resistance compared to regular refractories, and damage is large. Therefore, conventional dip pipes have a large wear damage.

また、従来の浸漬管を繰り返し使用すると、急熱・急冷の熱サイクルによるスポーリングや定形耐火物と不定形耐火物の熱伝導率や熱膨張率の大きな相違から、両者の境界部目地の拡大を引き起こす。さらに、芯金の熱変形で浸漬管の下端がラッパ状に変形し、定形耐火物の押さえ構造を緩ませ境界部目地の拡大を引き起こす。その結果、目地境界部に地金やスラグが差し込み、下端不定形耐火物が欠落し低寿命となる。   In addition, when the conventional dip tube is used repeatedly, the joint between the two is enlarged due to the spalling due to the rapid and rapid thermal cycles and the large difference in thermal conductivity and thermal expansion coefficient between the regular refractory and the irregular refractory. cause. Furthermore, the lower end of the dip tube is deformed into a trumpet shape due to the thermal deformation of the cored bar, loosening the holding structure of the regular refractory, and causing expansion of the boundary joint. As a result, a bullion or slag is inserted into the joint boundary portion, and the lower end amorphous refractory is lost, resulting in a short life.

本発明は、上記従来の簡易精錬装置用浸漬管の問題に鑑みてなされたものであり、溶鋼と接する下端部の摩耗及び溶損が少ない簡易精錬装置用浸漬管を提供することを課題とする。   This invention is made in view of the problem of the said conventional dip tube for simple refining apparatuses, and makes it a subject to provide the dip pipe for simple refining apparatuses with little abrasion and melting loss of the lower end part which touches molten steel. .

上記の課題を解決するためになされた本発明の簡易精錬装置用浸漬管は、上部にフラン
ジを持つ円筒状芯金の内周、下端及び外周を耐火物で被覆してなる簡易精錬装置用浸漬管
において、前記浸漬管のうち、溶鋼に浸漬される部位の前記耐火物が塩基性煉瓦であり、前記塩基性煉瓦は、内周、下端及び外周にかけて一体物であることを特徴としている。 The dip tube for a simple smelting apparatus of the present invention made to solve the above problems is a dip for a simple smelting apparatus in which the inner periphery, the lower end and the outer periphery of a cylindrical metal core having a flange on the top are covered with a refractory. In the pipe, the refractory in the portion immersed in the molten steel in the dip pipe is a basic brick , and the basic brick is a single piece over the inner periphery, the lower end, and the outer periphery .

また、上記浸漬管は、前記塩基性煉瓦に埋設された吊り上げ金具と、一端が前記フランジに固定され他端が前記吊り上げ金具に固定された連結金具と、を備える塩基性煉瓦吊り上げ部材を有するとよい。   In addition, the dip tube has a basic brick lifting member provided with a lifting bracket embedded in the basic brick, and a connecting bracket having one end fixed to the flange and the other end fixed to the lifting bracket. Good.

また、前記塩基性煉瓦は、周方向に分割された複数の分割煉瓦からなり、該分割煉瓦は、分割面に該分割煉瓦に埋め込まれた爪をもつ金属板を備えるものとするとよい。   The basic brick may be composed of a plurality of divided bricks divided in the circumferential direction, and the divided brick may be provided with a metal plate having claws embedded in the divided bricks on a divided surface.

塩基性煉瓦は、不定形耐火物（キャスタブル耐火物）に比べ耐食性に優れるので、溶鋼に浸漬される浸漬管下部の外周、下端及び内周に塩基性煉瓦が配置されている浸漬管は摩耗・溶損が少なく、耐用回数が高い。   Basic bricks have better corrosion resistance than irregular refractories (castable refractories), so dip pipes with basic bricks placed on the outer, lower and inner circumferences of the lower part of the dip pipe immersed in molten steel Low melting loss and high service life.

塩基性煉瓦が、内周、下端及び外周にかけて一体物であると、塩基性煉瓦の吊り上げ構造が簡単になり且つ浸漬管の組み立て製造が容易になる。   When the basic brick is an integral part from the inner periphery, the lower end, and the outer periphery, the lifting structure of the basic brick is simplified and the assembly of the dip tube is facilitated.

塩基性煉瓦吊り上げ部材を有すると、塩基性煉瓦がフランジによって吊り上げられ、塩基性煉瓦の脱落がなくなり、浸漬管の耐用回数が高くなる。   When the basic brick lifting member is provided, the basic brick is lifted by the flange, so that the basic brick does not fall off, and the dip tube has a long service life.

塩基性煉瓦が、周方向に分割された複数の分割煉瓦からなり、該分割煉瓦は、分割面に該分割煉瓦に埋め込まれた爪を持つ金属板を備えるので、使用時の受熱によって隣り合う分割煉瓦同士の金属板が溶着して連結される。その結果、目地開きが防止される。また、金属板の爪が分割煉瓦に食い込んでいるので、急熱・急冷の繰り返し使用による熱スポールで塩基性煉瓦に亀裂が発生しても脱落を防止することができる。   The basic brick is composed of a plurality of divided bricks divided in the circumferential direction, and the divided bricks are provided with metal plates having claws embedded in the divided bricks on the divided surfaces, so that the adjacent bricks are separated by receiving heat during use. Metal plates between bricks are welded and connected. As a result, joint opening is prevented. Further, since the claw of the metal plate bites into the divided brick, it is possible to prevent the falling off even if the basic brick is cracked by the heat spall by repeated use of rapid heating and rapid cooling.

本発明の実施形態を図面を参照して詳しく説明する。   Embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の簡易精錬装置用浸漬管の一部断面で示す上面図である。図２は、図１のＡ−Ａ線断面図、図３は、分割塩基性煉瓦１２３の上面図と側面図である。   FIG. 1 is a top view showing a partial cross section of a dip tube for a simple refining apparatus of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a top view and a side view of the divided basic brick 123. FIG.

浸漬管１２は、上部にフランジ１２１bをもつ円筒状芯金１２１と、芯金１２１の円筒状芯金本体１２１aの内周、下端及び外周を被覆する耐火物被覆部材１２２と、耐火物被覆部材１２２のうち少なくとも溶鋼に浸漬される下部を被覆する複数の分割塩基性煉瓦１２３と、を有している。浸漬管１２は、芯金１２１を収容する凹部１２３bをもつ複数の分割塩基性煉瓦１２３を周方向に全周に渡って配置し、該凹部１２３bに芯金１２１の下部を収容し、芯金１２１と塩基性煉瓦１２３との隙間に耐火物被覆部材１２２を介在させ、芯金１２１の上部を耐火物被覆部材１２２で被覆したものである。   The dip tube 12 includes a cylindrical cored bar 121 having a flange 121b at the top, a refractory coating member 122 that covers the inner circumference, the lower end, and the outer circumference of the cylindrical cored bar body 121a of the cored bar 121, and a refractory coated member 122. And a plurality of divided basic bricks 123 covering at least the lower part immersed in the molten steel. The dip tube 12 has a plurality of divided basic bricks 123 having recesses 123b for receiving the cored bar 121 arranged in the circumferential direction over the entire circumference, and stores the lower part of the cored bar 121 in the recesses 123b. The refractory covering member 122 is interposed in the gap between the refractory and the basic brick 123, and the upper portion of the cored bar 121 is covered with the refractory covering member 122.

芯金１２１は、円筒状芯金本体１２１aと、その上部に形成されたフランジ部１２１bと、を有している。   The cored bar 121 has a cylindrical cored bar main body 121a and a flange part 121b formed on the upper part thereof.

１２２は、芯金本体１２１aを被覆する耐火物被覆部材である。耐火物被覆部材１２２は、例えば、ハイアルミナ−マグネシア系の流し込み（キャスタブル）材であり、大略Ａｌ２Ｏ３が９割、ＭｇＯが１割の組成であり、微量の流動性調整材、発熱調整材と共に結合材として高アルミナセメントを含み、スチールファイバーは外掛けで添加するものを使用することができる。 Reference numeral 122 denotes a refractory covering member that covers the core metal body 121a. The refractory covering member 122 is, for example, a high-alumina-magnesia-based cast (castable) material, which is roughly composed of 90% Al 2 O 3 and 10% MgO. A high-alumina cement can be used as a binder together with the material, and steel fibers can be used that are added as a hull.

分割塩基性煉瓦１２３は、図３に示すように上面視で台形状をしており、先細側を内径側になるように周方向に連結することでリング状になる。分割塩基性煉瓦１２３は、耐火物被覆部材１２２で被覆された芯金本体１２１aを収容する前記リング状の軸方向に延びる凹部１２３bをもつ。また、上面には、上面メタルケース（金属プレートにＶ字の切り込みを入れて頂点を起こして爪を形成したもの）１２３aが、形成された爪を塩基性煉瓦１２３に埋め込んだ状態で固定されており、アングル１２５を介して芯金本体１２１aに溶接されている。さらに、側面には、側面メタルケース１２３cが、その爪を塩基性煉瓦１２３に埋め込んだ状態で固定されている。   The divided basic brick 123 has a trapezoidal shape when viewed from above as shown in FIG. 3 and is ring-shaped by connecting the tapered side in the circumferential direction so as to be the inner diameter side. The divided basic brick 123 has the ring-shaped axially extending recess 123b that accommodates the cored bar body 121a covered with the refractory covering member 122. Also, on the upper surface, an upper surface metal case (a metal plate with a V-shaped cut formed to raise the apex to form a nail) 123a is fixed in a state where the formed nail is embedded in the basic brick 123. And is welded to the metal core body 121a through an angle 125. Further, a side metal case 123c is fixed to the side surface with the claws embedded in the basic brick 123.

図３に示す浸漬管の内周、下端及び外周を一体的に被覆する分割塩基性煉瓦１２３は、プレス成形によって一体形成される。プレス成形する際、型枠内の所定の位置に吊り上げ金具１２４b、上面メタルケース１２３a及び側面メタルケース１２３cをセットすることで、吊り上げ金具１２４bが分割塩基性煉瓦１２３に埋め込まれ、上面メタルケース１２３a及び側面メタルケース１２３cの爪が分割塩基性煉瓦１２３に埋め込まれる。   The divided basic brick 123 that integrally covers the inner periphery, the lower end, and the outer periphery of the dip tube shown in FIG. 3 is integrally formed by press molding. When press forming, the lifting metal fitting 124b, the upper surface metal case 123a and the side surface metal case 123c are set at predetermined positions in the mold, so that the lifting metal fitting 124b is embedded in the divided basic brick 123, and the upper surface metal case 123a and The claws of the side metal case 123 c are embedded in the divided basic brick 123.

分割塩基性煉瓦１２３の材質は、例えば高耐食性で耐スポール性に優れるＭｇＯ−Ｃ（マグネシア・黒鉛）材質からなる。   The material of the divided basic brick 123 is made of, for example, a MgO—C (magnesia / graphite) material having high corrosion resistance and excellent spall resistance.

分割塩基性煉瓦１２３には、上記のように吊り上げ金具１２４bが埋め込まれており、ナット１２４cを介して耐火物被覆部材１２２に埋め込まれた連結金具１２４aと連結され、塩基性煉瓦吊り上げ部材１２４を構成している。連結金具１２４aの端部の数カ所は、芯金１２１に溶接されている。   In the divided basic brick 123, the lifting metal fitting 124b is embedded as described above, and is connected to the connecting metal fitting 124a embedded in the refractory covering member 122 via the nut 124c to constitute the basic brick lifting member 124. doing. Several places at the end of the connection fitting 124 a are welded to the cored bar 121.

次に、上記の分割塩基性煉瓦１２３を用いて本発明の浸漬管１２を作製する方法を説明する。
（成形工程）
先ず、例えば、電融マグネシアの粗粒、中粒、微粉と天然黒鉛及び酸化防止剤を混合してフェノール樹脂を加えて混練する。次いで、その混練物を短辺側金型、長辺側金型及び下型で形成されるキャビティーに充填する。なお、充填する前に、キャビティーの所定の位置に側面メタルケース１２３cを配置する。また、混練物を所定の位置まで充填した後に吊り上げ金具１２４bを配置して更に混練物を充填する。その後、上面メタルケース１２３aを載せて上型を下降させ加圧成形する。本実施形態ではフリクションプレスを用いたが、油圧プレスを使用してもかまわない。
（加工工程）
次に、型枠から成形体を取り出し、所定の加熱処理を行った後、凹部１２３bを機械加工で形成して図３に示す分割塩基性煉瓦１２３を得る。
（セッティング工程）次に、分割塩基性煉瓦１２３を周方向に配置してリング状に接着し、凹部１２３bに芯金本体１２１aを所定の深さまで挿入する。次いで、上面メタルケース１２３aと芯金本体１２１aとをアングル１２５を介して溶接する。また、吊り上げ金具１２４bと連結金具１２４aとを連結し、連結金具１２４aを芯金１２１に溶接する。
（鋳込み工程）次に、分割塩基性煉瓦１２３の外周面と内周面に型枠（不図示）を配置し、不定形耐火物を充填し、図１及び図２に示す浸漬管１２となる。 Next, a method for producing the dip tube 12 of the present invention using the divided basic brick 123 will be described.
(Molding process)
First, for example, electrofused magnesia coarse, medium and fine powders are mixed with natural graphite and an antioxidant, and a phenol resin is added and kneaded. Next, the kneaded product is filled into a cavity formed by a short side mold, a long side mold, and a lower mold. Note that the side metal case 123c is disposed at a predetermined position of the cavity before filling. In addition, after the kneaded material is filled to a predetermined position, the lifting metal fitting 124b is arranged to further fill the kneaded material. Thereafter, the upper metal case 123a is placed and the upper die is lowered to perform pressure molding. In this embodiment, a friction press is used, but a hydraulic press may be used.
(Processing process)
Next, after taking out a molded object from a mold and performing predetermined heat processing, the recessed part 123b is formed by machining and the division | segmentation basic brick 123 shown in FIG. 3 is obtained.
(Setting step) Next, the divided basic bricks 123 are arranged in the circumferential direction and bonded in a ring shape, and the core metal main body 121a is inserted into the recess 123b to a predetermined depth. Next, the upper metal case 123 a and the core metal body 121 a are welded through the angle 125. Further, the lifting metal fitting 124 b and the connection metal fitting 124 a are connected, and the connection metal fitting 124 a is welded to the core metal 121.
(Casting step) Next, a mold (not shown) is arranged on the outer peripheral surface and inner peripheral surface of the divided basic brick 123, filled with an irregular refractory, and the dip tube 12 shown in FIGS. 1 and 2 is obtained. .

本発明の浸漬管１２においては、溶鋼に接するのは高耐食性を示す塩基性煉瓦１２３であり、溶損が少なく耐用回数が高い。   In the dip tube 12 of the present invention, the basic brick 123 that shows high corrosion resistance is in contact with the molten steel, and the number of times of use is high with little melting loss.

また、耐火物被覆部材１２２は、溶鋼に接しないので耐食性が低くてもよい。そのため耐火物被覆部材１２２として、上記のようにキャスタブル耐火物を採用することができ、浸漬管１２の製作が容易になる。   Moreover, since the refractory covering member 122 does not contact the molten steel, the corrosion resistance may be low. Therefore, a castable refractory can be employed as the refractory covering member 122 as described above, and the dip tube 12 can be easily manufactured.

また、分割塩基性煉瓦１２３が一体物であるので、塩基性煉瓦１２３の吊り上げ構造が簡単になり且つ浸漬管の組み立て製造が容易になる。   Further, since the divided basic brick 123 is a single body, the lifting structure of the basic brick 123 is simplified, and the assembly of the dip tube is facilitated.

また、吊り上げ部材１２４をもつので、耐火物被覆部材１２２と塩基性煉瓦１２３が連結され、更に連結金具１２４aの端部の数カ所がフランジ１２１bに溶接されているので塩基性煉瓦１２３は耐火物被覆部材１２２を引っ張ることなく、フランジ１２１bで吊られている。したがって、芯金１２１と耐火物被覆部材１２２及び塩基性煉瓦１２３との結合が強くなり、浸漬管１２の耐用回数が高くなる。   Further, since the lifting member 124 is provided, the refractory covering member 122 and the basic brick 123 are connected to each other, and further, some of the end portions of the connection fitting 124a are welded to the flange 121b. It is suspended by the flange 121b without pulling 122. Accordingly, the bond between the cored bar 121, the refractory covering member 122, and the basic brick 123 is strengthened, and the number of times of use of the dip tube 12 is increased.

また、塩基性煉瓦１２３が上面メタルケース１２３aを持ち、そのメタルケース１２３aと芯金１２１とが連結されているので、塩基性煉瓦１２３の固定は、より確実になる。   Moreover, since the basic brick 123 has the upper surface metal case 123a and the metal case 123a and the metal core 121 are connected, the basic brick 123 is more reliably fixed.

また、分割塩基性煉瓦１２３が側面メタルケース１２３cを持ち、隣り合う分割塩基性煉瓦１２３が側面メタルケース１２３c同士で溶着されているので、目地開きを防止することができる。また、上面メタルケース１２３cの爪が分割塩基性煉瓦１２３に食い込んでいるので、急熱・急冷の繰り返し使用による熱スポールで塩基性煉瓦に亀裂が発生しても脱落を防止することができる。   Moreover, since the divided basic brick 123 has the side metal case 123c and the adjacent divided basic bricks 123 are welded together between the side metal cases 123c, joint opening can be prevented. Moreover, since the nail | claw of the upper surface metal case 123c bites into the division | segmentation basic brick 123, even if a basic brick is cracked by the heat | fever spur by repeated use of rapid heating and rapid cooling, it can prevent dropping.

また、分割塩基性煉瓦１２３が凹部１２３bをもち、不定形耐火物１２２との目地がイ−ロ−ハと長く迂回するので（図２参照。）、浸漬管１２を溶鋼に浸漬して内周側を減圧した際、外気のリークが少ない。   Further, since the divided basic brick 123 has the concave portion 123b and the joint with the irregular refractory 122 is long detoured to the yellow (see FIG. 2), the dip tube 12 is immersed in the molten steel and the inner circumference. There is little leakage of outside air when the side is decompressed.

上記実施形態の浸漬管と、芯金の内周、下端及び外周を不定形耐火物のみで被覆した従来の浸漬管と、を比較した結果、従来の浸漬管（キャスタブル）の溶損速度が約１０ｍｍ／チャージであるのに対し、本発明の浸漬管の溶損速度は１ｍｍ／チャージ以下であった。   As a result of comparing the dip tube of the above embodiment with a conventional dip tube in which the inner periphery, lower end and outer periphery of the core metal are covered only with an irregular refractory, the rate of erosion of the conventional dip tube (castable) is about Whereas it was 10 mm / charge, the erosion rate of the dip tube of the present invention was 1 mm / charge or less.

本発明の浸漬管の上面図（一部断面で示す）である。It is a top view (a partial cross section shows) of the dip tube of the present invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 図２の塩基性煉瓦の上面図と側面図である。FIG. 3 is a top view and a side view of the basic brick of FIG. 2.

符号の説明Explanation of symbols

１２・・・・・・・・・・浸漬管
１２１・・・・・・・・円筒状芯金
１２１b・・・・・フランジ
１２２・・・・・・・・耐火物被覆部材
１２３・・・・・・・・塩基性煉瓦
１２４・・・・・・・・塩基性煉瓦吊り上げ部材
１２４a・・・・・ 連結金具
１２４b・・・・・ 塩基性煉瓦吊り上げ金具 12 ...... Dip tube
121 ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical cored bar
121b: Flange 122: Refractory covering member 123: Basic brick 124: Basic brick lifting member
124a ... Connecting bracket
124b ... Basic brick lifting bracket

Claims (3)

上部にフランジを持つ円筒状芯金の内周、下端及び外周を耐火物で被覆してなる簡易精
錬装置用浸漬管において、
前記浸漬管のうち、少なくとも溶鋼に浸漬される部位の前記耐火物が塩基性煉瓦であり、
前記塩基性煉瓦は、前記内周、下端及び外周にかけて一体物であることを特徴とする簡易精錬装置用浸漬管。 In the dip tube for a simple refining device, the inner periphery, lower end and outer periphery of a cylindrical cored bar having a flange on the top are covered with a refractory
Of the dip tube, at least the refractory of the part immersed in the molten steel is a basic brick ,
The basic brick is a dip tube for a simple refining device, characterized in that the basic brick is a single piece extending from the inner periphery to the lower end and the outer periphery . 前記塩基性煉瓦に埋設された吊り上げ金具と、一端が前記フランジに固定され他端が前
記吊り上げ金具に固定された連結金具と、を備える塩基性煉瓦吊り上げ部材を有する請求
項１に記載の簡易精錬装置用浸漬管。 Simple refining of claim 1 having a lifting bracket embedded in the basic brick, a connecting fitting having one end and the other end is fixed to the flange is secured to the lifting bracket, the basic bricks lifting member having a Immersion tube for equipment. 前記塩基性煉瓦は、周方向に分割された複数の分割煉瓦からなり、該分割煉瓦は、分割
面に該分割煉瓦に埋め込まれた爪をもつ金属板を備える請求項１または２に記載の簡易精錬装置用浸漬管。 The simple brick according to claim 1 or 2 , wherein the basic brick includes a plurality of divided bricks divided in a circumferential direction, and the divided brick includes a metal plate having claws embedded in the divided brick on a divided surface. Dip tube for refining equipment.
JP2008241278A 2008-09-19 2008-09-19 Dipping pipe for simple refining equipment Expired - Fee Related JP5483848B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5740226B2 (en) * 2011-06-30 2015-06-24 東京窯業株式会社 Immersion tube for vacuum degassing equipment
JP5725656B2 (en) * 2011-06-30 2015-05-27 東京窯業株式会社 Immersion tube for vacuum degassing equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09227929A (en) * 1996-02-20 1997-09-02 Harima Ceramic Co Ltd Immersion tube for molten steel
JPH101714A (en) * 1996-06-10 1998-01-06 Kurosaki Refract Co Ltd Immersion tube for treating molten metal
JPH1180828A (en) * 1997-09-10 1999-03-26 Kawasaki Steel Corp Immersion tube in degassing equipment
JP4105787B2 (en) * 1997-09-22 2008-06-25 黒崎播磨株式会社 Steel dip tube

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